出版品必須具備正確的教義

為了不辜負身為印刷使徒的職責，出版品必須具備正確的教義、完善的道德和美的形式，不需要總是談論宗教，但必須以基督宗教的方式來寫作。（AE, 159）

To not fall short in one’s duty as a press apostle that requires giving the true doctrine, the good in morals and the beautiful in appearance, does not mean one has to write always about religion. One needs, however, to write always in a Christian way (AE, 159).